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Combustion

A substance w...

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A substance which reacts with oxygen giving heat is called a combustible substance. Which one of the following is a combustible substance?

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Q. Question 1
A substance which reacts with oxygen giving heat is called a combustible substance. Which, one of the following is a combustible substance?

(a) Iron nail
(b) Glass
(c) Stone piece
(d) Wood

A physical process in which a substance reacts with oxygen to give off heat is called combustion

A ____________ process in which a substance reacts with __________ to give off heat is called combustion.

Q. Fill in the blanks using the words given in the box.

ignition, petrol, combustion, calorific value, combustible, inflammable

(a) A chemical process in which a substance reacts with oxygen to give off heat is called ______.
(b) Wood, paper, CNG are __________ substances.
(c) The lowest temperature at which a substance catches fire is called its ______ temperature.
(d) Ignition temperature of _______ is lower than that of wood.
(e) The substances which have very low _______ temperature and can easily catch fire with a flame are called _______ substances.
(f) The amount of heat energy produced on complete combustion of 1kg of a fuel is called its ______.

A chemical process in which a substance reacts with oxygen to give off heat is called _________.

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